From: "KOSAKI Motohiro" <m-kosaki@ceres.dti.ne.jp>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, jeremy@goop.org, ebiederm@xmission.com,
travis@sgi.com, herbert@gondor.apana.org.au, xemul@openvz.org,
penberg@cs.helsinki.fi
Subject: Re: [patch 0/4] Cpu alloc V5: Replace percpu allocator in modules.c
Date: Sat, 20 Sep 2008 00:28:02 +0900 [thread overview]
Message-ID: <2f11576a0809190828s4b74ac5y8cd6dd201332fbe2@mail.gmail.com> (raw)
In-Reply-To: <20080919145859.062069850@quilx.com>
Hi Cristoph,
> Just do the bare mininum to establish a per cpu allocator. Later patchsets
> will gradually build out the functionality.
>
> The most critical issue that came up on the last round is how to configure
> the size of the percpu area. Here we simply use a kernel parameter and use
> the static size of the existing percpu allocator for modules as a default.
>
> The effect of this patchset is to make the size of percpu data for modules
> configurable. Its no longer fixed at 8000 bytes.
I don't know so much this area.
Could you please what are the problem that you think about?
performance?
fixed-size cause per-cpu starvation by huge user?
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next prev parent reply other threads:[~2008-09-19 15:28 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-19 14:58 Christoph Lameter
2008-09-19 14:59 ` [patch 1/4] Make the per cpu reserve configurable Christoph Lameter
2008-09-20 3:55 ` KAMEZAWA Hiroyuki
2008-09-20 23:15 ` Christoph Lameter
2008-09-19 14:59 ` [patch 2/4] percpu: Rename variables PERCPU_ENOUGH_ROOM -> PERCPU_AREA_SIZE Christoph Lameter
2008-09-19 14:59 ` [patch 3/4] cpu alloc: The allocator Christoph Lameter
2008-09-19 15:23 ` KOSAKI Motohiro
2008-09-19 16:27 ` Eric Dumazet
2008-09-19 16:49 ` Christoph Lameter
2008-09-19 17:00 ` Christoph Lameter
2008-09-19 20:32 ` Christoph Lameter
2008-09-19 14:59 ` [patch 4/4] cpu alloc: Use cpu allocator instead of the builtin modules per cpu allocator Christoph Lameter
2008-09-19 15:28 ` KOSAKI Motohiro [this message]
2008-09-19 15:50 ` [patch 0/4] Cpu alloc V5: Replace percpu allocator in modules.c Christoph Lameter
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